Heathrow's third runway project has been delayed by up to four years, with the airport now aiming to open the new runway by 2039. The delay comes as Prime Minister Andy Burnham dodged questions about whether he supports the contested expansion.
Over the weekend, it emerged that Heathrow no longer expects to meet the original 2035 deadline. Instead, the airport hopes to secure planning permission by 2029 and then open the runway "within a decade," meaning it would not be operational until 2039. The delay has raised concerns about the UK's infrastructure competitiveness and the government's commitment to major projects.
Burnham's Stance on Heathrow Expansion
At the Labour party conference in Liverpool on Sunday, Burnham was asked if he was in favour of building a third runway. He called the issue "contested" and said it was "principally a matter for London and London MPs." Burnham, who has previously criticised the expansion, said he did not want to "jump straight in" before considering the results of a public consultation which ran over the summer.
"There are different views and you have to take those views seriously in coming to a decision," he said. His reluctance to endorse the project signals lukewarm support from key political figures, adding uncertainty to Heathrow's plans.
Project Details and Impact
Heathrow is seeking to build a £33bn runway, enabling it to operate up to 756,000 flights a year. At present, the number is capped at 480,000. Making way for the runway involves demolishing hundreds of homes, diverting rivers and rerouting a section of the M25 motorway through a tunnel. However, it is estimated it would create 100,000 jobs and boost the economy by billions.

The expansion has faced opposition from environmental groups and local residents concerned about noise and air pollution. The delay gives opponents more time to challenge the project, while supporters worry about the UK falling behind in global connectivity.
Timeline Comparison: Original vs. Revised
| Milestone | Original Plan | Revised Plan |
|---|---|---|
| Planning Permission | 2025 | 2029 |
| Runway Operational | 2035 | 2039 |
| Flight Cap | 480,000 (current) | 756,000 (target) |
| Estimated Cost | £14bn (2016) | £33bn (current) |
Key Takeaways
- Heathrow's third runway is delayed by up to four years, now expected to open in 2039.
- Andy Burnham avoided endorsing the project, calling it "contested" and a matter for London.
- The £33bn expansion aims to increase flight capacity to 756,000 annually, creating 100,000 jobs.
- Environmental and local opposition remains strong, with concerns over demolition and pollution.
Frequently Asked Questions
Why is the Heathrow third runway delayed?
The delay is due to the need for further planning and public consultation, pushing the operational date from 2035 to 2039.
What is Andy Burnham's position on the expansion?
Burnham has not explicitly supported the expansion, calling it "contested" and suggesting it is primarily a matter for London MPs.
How will the third runway affect flight capacity?
The expansion would increase the flight cap from 480,000 to 756,000 per year, significantly boosting UK connectivity.